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/*
 * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.cloudslang.runtime.impl;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

/**
 * Created by Genadi Rabinovich, [email protected] on 05/05/2016.
 */
public abstract class ExecutionEngine {
    private static final String NO_DEPENDENCIES_KEY = "";

    protected String generatedDependenciesKey(Set dependencies) {
        // optimistic - this is java (which has only one dependency) or python with on dependency
        if(dependencies.size() == 1) {
            return dependencies.iterator().next();
        }
        // optimistic - this is old content - no dependencies
        if(dependencies.isEmpty()) {
            return NO_DEPENDENCIES_KEY;
        }

        List actionDependencies = new ArrayList<>();
        actionDependencies.addAll(dependencies);
        Collections.sort(actionDependencies);
        StringBuilder sb = new StringBuilder();
        for (String dependency : actionDependencies) {
            sb.append(dependency).append(";");
        }
        return sb.toString();
    }
}